September 2015
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1 Citation
JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
The action of the Research & Investigation Committee on Glare of LED Lighting Fixtures in Outdoor Lighting Environments is to examine whether the correlated color temperature affects the glare discomfort factor, visibility of human face and evaluations on environment under LED street lights. In this study, the purpose is to provide the data using LED test lights with seven different correlated color temperatures ranging from 2800K to 12000K in a recreated night-time street atmosphere. The results of this evaluation show street brightness, sense of security, color differentiation, cool/warm feeling, preference of atmosphere and adequateness of lighting under average illuminance on a recreated road surface set at 2 to 5 lx. Therefore, the all evaluations are affected by the correlated colour temperature in positions nearer to the targets. The lower correlated color temperature lights are evaluated more preferable than the higher correlated color temperature lights.